Huge Lava Collapse Rings in Hawaii's New Year

A lava delta — an expanse of unstable rocky terrain formed by cooled lava — in Hawaii Volcanoes National Park collapsed suddenly into the ocean on New Year's Eve, creating a spectacle of volcanic ash, steam and gas to mark the end of 2016. The 26-acre (11 hectares) delta was created by a recent and massive lava flow from the Kilauea volcano pouring into the sea. The feature's collapse produced towering plumes of ash and sent large waves washing over and eroding the nearby sea cliff,